import * as THREE from 'three';
import type { PointCloudPlacement, PointCloudSourceUp } from '../pointcloud/pointCloudPlacement';
/** A splat's stored placement. Same shape and same column as a point cloud's. */
export type SplatPlacement = PointCloudPlacement;
export declare const DEFAULT_SPLAT_PLACEMENT: SplatPlacement;
/**
 * Levels a splat onto the scene's Y-up. `'y'` means Y-**down** here: the common 3DGS
 * training pipelines export flipped, which is why Spark's own examples rotate by pi.
 */
export declare function splatUpFixQuaternion(sourceUp: PointCloudSourceUp): THREE.Quaternion;
export declare function applySplatUpAxis(object: THREE.Object3D, sourceUp: PointCloudSourceUp): void;
//# sourceMappingURL=splatUpAxis.d.ts.map